This paper presents an improved equivalent rectangular model for calculating the ground resistance of the human foot in substations. The ground resistance of the human foot is affected by the limited depth of the gravel layer in substation yards. The equations given in IEEE Standard 80 are derived with certain assumptions that simplify the mathematics involved but introduce errors. The error in the ground resistance of the foot obtained from these equations is large when the depth of the gravel layer is small and the reflection factor is high. Thus, Thapar had proposed an improved equivalent circular plate as well as an equivalent rectangular plate to determine the ground resistance of the human foot. This paper extends the Thapar's model and proposes an improved equivalent rectangular model for calculating the ground resistance of the human foot. Results obtained by the proposed approach are compared with the IEEE Standard 80 and Thapar's model.
|Number of pages||7|
|Journal||Journal of the Chinese Institute of Electrical Engineering, Transactions of the Chinese Institute of Engineers, Series E/Chung KuoTien Chi Kung Chieng Hsueh K'an|
|Publication status||Published - 2002 Aug 1|
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering